Rubber boot



Aus. 20, 1929.- A. A. 4GUDDEN ET-AL 1,725,347

RUBBER BOOT Filed Sept. 4. 1928 [7112671/0715/ @f2/frm di. ommen, 77102710@ Mwuadf.,

Patented Aug. 20, 11929.

UNITED STATES `Parleur OFFICE.

. ALFRED A. GLIDDEN AND THOMAS M. KNOWLAND, OF WATERTOWN, MASSACHUSETTS,

(A ASSIGNORS T0 HOOD RUBBER COMPANY, 0F. WATERTOWN, MASSACHUSETTS, Al

CORPORATION' 0F MASSACHUSETTS.

RUBBER, BOOT.

Application filed September 4, 1928. Serial No. 303,665.

the boot leg or the top from becoming'y cracked by bending, and furthermore, the

invention relates to a construction whereby in a top boot the top will stay in position on the leg of the wearer without any means for connecting it to a belt to prevent it from slipping down on the leg.

These results are attained by providing on the outersurface of the leg, and/or top portion of the boot, corrugations, preferably oppositely inclined to each other and inter'- secting each other at an acute angle, thus forming diamond-shaped sections of avgreater length longitudinally than circumferentially of the leg of the boot. The top portion of the boot is Aalso provided with circumferentially extending ribs on its inner face, preferablythese circumferentially eX- tending ribs are annular ribs.

The invention consists in a rubber boot of the construction hereinafter set forth in the particularly as pointed out t taken on line 2 2, Fig. l.

Fig. 3 is a detail view of a portion of the top or leg of the boot illustrating the diamond-shaped corrugations on the outer face thereof.

Fig. 1 is a detail'my section illustrating a Vertical section of a portion of the leg of a boot without corrugations. l p

Fig. 5 is a detailsection of a portion of the leg of a boot with corrugations. Fig. 6 is an enlarged detail section taken on line 6 6, Fig. 1. o'

Y Like numerals refer to like several views ofthe drawings.

In the drawings, 6 is a rubberboot embodying a foot portion 7 a leg portion 8 and Aatop portion 9. The outer surface of the leg and top portion of this embodiment of our invention is provided with corrugations 10 andv 1I which are inclined to each other parts inthe and intersect each other, forming diamondshapedgsections 12. The inner face. of the .top portiony 9 is provided with circumferentially extending or annular ribs 13.

In Fig. 4 a portion 15 of the leg of a boot is illustrated which is not provided-with corrugations, the result being that when bent at any portion, such as back of the knee or above the 4instep on the front, itl will form u.

abrupt bends 16, and these bends will eventually cause the rubber to crack along the portion 17.

In Fig. 5 a section of the portion of a legl of a boot is shown which is provided with the corrugations 10 and 11, and it will be seen that the rubber of the leg portion oftheboot in this case bends along an arc of greater radius as at 18, so that no abrupt line causing the rubber to crack is formed in the boot leg when the same is bent as at the throat or at the rear of the knee. The abrupt bends and cracking strains illustrated in Fig. 4 are prevented, as shown in Fig. 5, by the corrugations 10 and 11 crossing each other preferably at an acute angle, thus lend.-

ing strength to the material of which the leg or top portion of the boot is constructed and preventing its depreciating by reason of the bending stresses brought to bear at 17, Fig. 4

' The additional strength referred to as beinv added tothe material of which the' leg or top portion of l the boot is constructed is due to thefollowing facts. The degree of flexing to which a-boot`leg is subjected depends on the angularity or sharpness of the bend. It is well known that the angul'arityv lor radius of curvature of the bend isinfluenced by the thickness of the material comprising the leg portion, so that the angular bending may be reduced by making the leg portion of the boot very thick. This results, however, in a heavy article-with a. p

high merchandise cost, and this can be avoided by means of the rib structure pre viously described.- This structure is such that when the boot leg is bent the ribs are compelled lto stretch and the same result attained with a comparativelylthin sheet material forming the leg with the ribs superimposed thereon, as would be attained by a l comparatively thick sheet material Without the ribs. In othervwords, .the boot leg is strongly reinforced out of proportion to the thickness or Weight of merchandise that is employed.

In order to prevent the top portion 9 of the boot from slipping down on the leg of the wearer, oircumferentially extending or annular ribs 13 are providedv on the inner face of the top portion. This causes the top portion to cling to the leg of the wearer in such a manner -thatit remains in position and does not slip down oir/the leg of' the wearer. and does away vWith the necessity for straps or other contrivances connecting the top portion with a belt.

We claim:

1. A rubber boot embodying foot andI leg portion, the leg portion having on its outer face oppositely inclined corrugations intersecting each other.

2. A rubber l ot embodying a foot and leg portion, the leg portion having on itsY youter face oppositely inclined corrugations intersecting each other, at an acute angle.

3.. A rubber 4bootembodylng a foot and leg portion, the leg`portion having on its outer face oppositely inclined corrugations intersecting each other at an acute angle onits outer face.

and forming diamond-shaped sections of a.

greater length longitudinally than Heireumferentially of said leg portion.

4. A rubber top boot embodying a foot portion, a leg portion and a top portion, the top 'portion having circumferentially extending ribs on lits inner face.

- 5. A rubber top boot embodying a foot portion, a leg portion and a top portion, the op portion having .annularv ribs on its inner ace.

6. A rubber top boot embodying a foot portion, a leg portion and a top portion, the top portion having circumferentially extending. ribs on its innerface and corrugations on its outer face. Y

7. A rubber top boot embodying a foot portion, a leg portion and a top portion, the

top portion having circumferentially extending ribs on its inner face and oppositely inclined corrugations intersecting each other In testimony whereof we have hereunto set ,our hands.

` ALFRED A. GLIDDEN. THOMAS M. KNOWLAND. 

